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2. Wireless microphone - Wikipedia

   en.wikipedia.org/wiki/Wireless_microphone

   A wireless microphone, or cordless microphone, is a microphone without a physical cable connecting it directly to the sound recording or amplifying equipment with which it is associated. Also known as a radio microphone , it has a small, battery-powered radio transmitter in the microphone body, which transmits the audio signal from the ...

3. Short-range device - Wikipedia

   en.wikipedia.org/wiki/Short-range_device

   A short-range device ( SRD ), described by ECC Recommendation 70-03, is a radio-frequency transmitter device used in telecommunication that has little capability of causing harmful interference to other radio equipment. Short-range devices are low-power transmitters, typically limited to 25–100 mW effective radiated power (ERP) or less ...

4. Squelch - Wikipedia

   en.wikipedia.org/wiki/Squelch

   Use of CTCSS is especially helpful on congested frequencies or on frequency bands prone to skip and during band openings. Professional wireless microphones use squelch to avoid reproducing noise when the receiver does not receive enough signal from the microphone. Most professional models have adjustable squelch, usually set with a screwdriver ...

5. Signal strength and readability report - Wikipedia

   en.wikipedia.org/wiki/Signal_strength_and...

   Signal strength and readability report. A signal strength and readability report is a standardized format for reporting the strength of the radio signal and the readability (quality) of the radiotelephone (voice) or radiotelegraph (Morse code) signal transmitted by another station as received at the reporting station's location and by their ...

6. Ultra high frequency - Wikipedia

   en.wikipedia.org/wiki/Ultra_high_frequency

   Ultra high frequency (UHF) is the ITU designation for radio frequencies in the range between 300 megahertz (MHz) and 3 gigahertz (GHz), also known as the decimetre band as the wavelengths range from one meter to one tenth of a meter (one decimeter).

7. Automatic meter reading - Wikipedia

   en.wikipedia.org/wiki/Automatic_meter_reading

   The meter communicates to its collection point using 900 MHz mesh network topology. Automatic meter reading ( AMR) is the technology of automatically collecting consumption, diagnostic, and status data from water meter or energy metering devices (gas, electric) and transferring that data to a central database for billing, troubleshooting, and ...